Showdown and Set-to

Showdown noun - A hostile disagreement face-to-face.

Set-to and showdown are semantically related In some cases you can use "Set-to" instead a noun "Showdown".

Set-to noun - An often noisy or angry expression of differing opinions.

Showdown and set-to are semantically related in conflict topic. You can use "Showdown" instead a noun phrase "Set-to", if it concerns topics such as often brief.